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21198 (1994 PX7)
Classification: Main-belt Asteroid          SPK-ID: 2021198
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1022364773385951 4.2769e-08  
a 2.779783609983356 1.6277e-08 au
q 2.495588325935095 1.2125e-07 au
i 1.870073190915 4.4711e-06 deg
node 295.4846759297666 0.00012724 deg
peri 45.06060469562173 0.00012867 deg
M 237.3115500069432 2.0525e-05 deg
tp 2459777.420658774751
(2022-Jul-16.92065877)
9.793e-05 TDB
period 1692.836099654566
4.63
1.4869e-05
4.071e-08
d
yr
n .2126608713468837 1.8679e-09 deg/d
Q 3.063978894031617 1.7941e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1017  
   data-arc span      10310 days (28.23 yr)  
   first obs. used      1992-02-28  
   last obs. used      2020-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51851  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:58:23  

Additional Information
 Earth MOID = 1.48547 au 
 Jupiter MOID = 2.28127 au 
 T_jup = 3.325 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.12   n/a E2021B10  

21198 (1994 PX7)          Discovered 1994-Aug-10 by Elst, E. W. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1994 PX7 = 1999 TZ122 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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